I propose any one of the following slogans for a possible favourite to those who don’t have one yet.
I suspect that when my kids become teenagers, they’ll hardly think of slogans, mottos, or any other smart-pants shibboleths which to use as a guide to how to live their lives, so, in case they (kids, my kids, your kids, anyone) were in search of their own favourite slogan one day, here are a few suggestions:

Slogan of the New Generation:MAKE LOVE NOT FACEBOOK PROFILES

Slogan of the Tools:TRY NOT TO SCREW UP TOO MUCH

Slogan of the Car:DON’T BE A BACKSEAT DRIVER

Slogan of the Circle:BEND OVER BACKWARDS…WHENEVER POSSIBLE

Slogan of the Legs:NEVER START ON THE WRONG FOOT

Slogan of the Bread:USE YOUR LOAF

Violet Crawley Dowager’s Slogan:I’M A WOMAN, I CAN BE AS CONTRARY AS I CHOOSE (Downton Abbey)

One of Oscar Wilde’s slogans:BE YOURSELF, EVERYONE ELSE IS TAKEN

Slogan of the Slogan:DON’T READ TOO MANY SLOGANS, GET ON WITH YOUR LIFE